3691618165870 has 16 divisors (see below), whose sum is σ = 6645143599920. Its totient is φ = 1476595954944.

The previous prime is 3691618165867. The next prime is 3691618165877. The reversal of 3691618165870 is 785618161963.

It is a junction number, because it is equal to n+sod(n) for n = 3691618165799 and 3691618165808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3691618165877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6111075 + ... + 6687934.

It is an arithmetic number, because the mean of its divisors is an integer number (415321474995).

Almost surely, 2^{3691618165870} is an apocalyptic number.

3691618165870 is a deficient number, since it is larger than the sum of its proper divisors (2953525434050).

3691618165870 is a wasteful number, since it uses less digits than its factorization.

3691618165870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12827859.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 3691618165870 in words is "three trillion, six hundred ninety-one billion, six hundred eighteen million, one hundred sixty-five thousand, eight hundred seventy".